May 11, 1858
No. Minnesota became the 32nd state on May 11, 1858. The US Revolutionary War ended in 1783 (about 75 years before Minnesota joined the Union). You might be thinking of the Civil War, which began in 1861 (after Minnesota joined the Union).
Iowa joined the Union as the 29th US State.
Missouri joined the Union on 10 August 1821 as the 24th US State.
No state joined the union prior to 1787. Delaware was admitted into the Union on December 7, 1787 becoming the 1st state to join the union.
Minnesota became a state the same way other states became states. The leaders of the Minnesota Territory petitioned the US Congress to join the union. After verifying that Minnesota had a viable constitution, large enough population, and a functional government, the US congress passed a law admitting Minnesota as a state. That happened on May 11, 1858.
No it joined the Union as the 15th US State.
The United States never joined the Western European Union.
On May 11, 1858, Minnesota became the 32nd state in the US.
The people of Minnesota. The legislature of the Minnesota Territory petitioned the US Congress to be admitted to the union.
Florida, Texas, Iowa, Wisconsin, California, Minnesota, Oregon and Kansas joined the Union between 1845 and the start of the American Civil War, which was on April 12, 1861. West Virginia and Nevada joined during the war.
No states joined the union while Franklin Pierce was President.
None. Alaska joined the US in 1959.